Sagari- Japanese legend: a horse head hanging by one long tentacle wrapped around a tree branch. It is the spirit of a horse that died under that tree. It whines loudly, expressing its loneliness and depression.
Keukegen- Japanese folklore: a creature covered in black fur that lives in peoples houses. Its name means "rarely seen". It was a disease spirit, inflicting sickness into those who lived in its host house.
The moral of most Japanese urban legends seem to consist of dont go anywhere by yourself. Ever. The story of the Kuchisake-Onna, or Split Mouth Woman is no different. Except that you are doubly unfortunate if you happen to be a child (We assume your legs are stubby and slow and we can thusly outrun you).